Chap 1 - number concepts

Question 1

different number groups

Answer 1

-imaginary
-real: - irrational, rational- integer, whole, natural

Question 2

define natural numbers

Answer 2

-positive whole numbers from 1 to infinite
-no include 0

Question 3

define whole number

Answer 3

positive integer
-including 0

Question 4

define integer

Answer 4

-any positive/ negative whole number
-including 0

Question 5

define odd

Answer 5

-number that cannot be exactly divided by 2

Question 6

define even

Answer 6

-number that can be exactly divided by 2

Question 7

define prime numbers

Answer 7

-whole numbers with itself and 1 as its factors

Question 8

define indices

Answer 8

number that can be put in power

Question 9

define square number

Answer 9

-product of number multiplied by itself

Question 10

define rational numbers

Answer 10

-numbers that can be put in fractions

Question 11

define irrational numbers

Answer 11

-numbers that cannot be put in fractions

Question 12

define fraction

Answer 12

-no. that represents part of a whole

Question 13

what is HCF

Answer 13

-highest common factor btw no.s

Question 14

what is LCM

Answer 14

-Lowest common multiple btw no.s

Question 15

how to express prime numbers as products of its prime factors

Answer 15

-use division
2| 4
2| 1
-use factor tree

Question 16

what does > mean

Answer 16

big> small

Question 17

what does < mean

Answer 17

small< big

Question 18

what is the order of brackets

Answer 18

( ), [ ]

Question 19

order of operations

Answer 19

-left to right
-brackets/ expand
-divide/ multiply
-add/ minus

Question 20

rounding no.s

Answer 20

-nearest whole no.
-1 dp
-2 dp
-3 sf- 1sf is non-0 number

Question 21

how to find LCM

Answer 21

-do prime factorisation
-same no.s will be written once & times with other no.s